<template>
  <div class="list">
    <van-list
      v-model="loading"
      :finished="finished"
      finished-text="没有更多了"
      @load="onLoad"
    >
      <div
        v-for="(item, index) in list"
        :key="index"
        :title="item"
        class="song"
      >
        <h3>{{ item.name }}</h3>
        <div class="singers">
          <span v-for="(singer, index) in item.singer" :key="singer.id">
            {{ singer.name }}
            <span v-show="index != item.singer.length - 1">/</span>
          </span>
          <span v-show="item.album">
            <span>·</span>
            <span>{{ item.album.name }}</span>
            <span>·</span>
            <span>{{ item.album.subtitle }}</span>
          </span>
        </div>
      </div>
    </van-list>
  </div>
</template>

<script>
export default {
  // 通过props接收父组件传递的数据<SingerIntro :singeid='id'>
  props: ["singeid"],
  data() {
    return {
      songlist: [], //歌曲列表
      songnum: 0, //歌曲列表数目
      list: [], //vant的list列表数据
      loading: false,
      finished: false,
    };
  },
  created() {
    this.getData(this.singeid, 1, 10);
  },
  methods: {
    getData(id, page, num) {
      this.$request(
        "get",
        "/api/singer/songs?singermid=" + id + "&page=" + page + "$num=" + num
      ).then((res) => {
        console.log(res);
        this.songlist = res.data.list;
        this.songnum = res.data.num;
      });
    },
    onLoad() {
      setTimeout(() => {
        // 注意splice和slice方法的差异
        this.list = this.list.concat(this.songlist.splice(0, 10));
        console.log(this.list);

        // 加载状态结束
        this.loading = false;

        // 数据全部加载完成
        if (this.list.length >= this.songnum) {
          this.finished = true;
        }
      }, 1000);
    },
  },
};
</script>

<style scoped>
.song {
  margin-bottom: 1rem;
}
.song > h3 {
  text-align: left;
  font-size: 1rem;
  padding: 0 2rem;
  margin: 0;
}
.singers {
  text-align: left;
  padding: 0 2rem;
}
.singers span {
  font-size: 0.8rem;
  color: gray;
}
.singers > span:nth-last-child(1) > span:nth-child(1) {
  margin: 0 0.3rem;
  font-weight: 900;
  color: red;
}
</style>